The first stamp, issued in 2021, depicts a Eurasian bittern (Botaurus stellaris). Of its two subspecies, the stamp must depict Botaurus stellaris stellaris, which is native to parts of Europe and Asia as well as coastal northern Africa. The other subspecies is endemic to areas of southern Africa. It feeds on fish, small mammals, young birds, amphibians, insects and crustaceans. Although it is classified as least concern, global populations are slowly declining.

The second stamp, belonging to the same set as the previous one, shows the pygmy cormorant (Microcarbo pygmaeus), which we have seen before.

Finally, the souvenir sheet was issued in 2018 and it shows a family of black woodpeckers (Dryocopus martius). The postcard also features this bird. It is the largest woodpecker species in Europe and one of the largest species in Asia. It has two subspecies. It feeds on insects.

 Both species, Grey heron (Ardea cinerea) and rock pigeon (Columba livia), have been introduced before. Actually, the rock pigeon stamp, issued in 2010, has already been shown. The grey heron stamp was issued in 2018. It is shown catching a frog.

The rock pigeon (Columba livia) has been shown a couple times before. The souvenir sheet used on the cover was issued in 2010.

Issued in 2023, this souvenir sheet depicts a black swan (Cygnus atratus) with its youngs. This waterbird is indigenous to Australia but it was introduced to various other countries in the recent past. They pair for life and they feed primarily on aquatic plants.